Orbit Fit and Astrometric record for 15VF164

The following information shows the result of the orbit fit based on Gary Bernstein's method. Most of the information should be self-explanatory. Take special note that while the original Bernstein software works with barycentric coordinates, we convert these results into a heliocentric coordinate system.

# Object: 15VF164   
# Created Mon Dec  6 02:13:35 2021
# Orbit generated from Bernstein formalism
# Fitting     24 observations of     24
# Arc:   4.45y
# First observation: 2015/09/07
#  Last observation: 2020/02/18
Preliminary a, adot, b, bdot, g, gdot:
  -0.005832   0.186510   0.000666  -0.018652   0.079741   0.000000
# Chi-squared of fit:     3.97 DOF:     42 RMS:  0.07
# Min/Max residuals:    -0.24    0.15
# Exact a, adot, b, bdot, g, gdot:
  3.379975E-05  1.634932E-01 -3.388824E-06 -1.606133E-02  7.740859E-02 -1.253628E-02
# Covariance matrix:
  2.9574E-13 -1.7541E-13 -5.8802E-15  2.2336E-14  1.7209E-13 -2.8957E-13
 -1.7541E-13  5.3821E-13  2.0158E-14 -6.0752E-14  3.7420E-14  7.1975E-13
 -5.8802E-15  2.0158E-14  7.9926E-14 -2.9862E-14  1.4837E-15  2.8592E-14
  2.2336E-14 -6.0752E-14 -2.9862E-14  3.8151E-14  3.9595E-16 -8.8291E-14
  1.7209E-13  3.7420E-14  1.4837E-15  3.9595E-16  1.9581E-13 -3.1004E-14
 -2.8957E-13  7.1975E-13  2.8592E-14 -8.8291E-14 -3.1004E-14  1.0575E-12
#      lat0       lon0       xBary       yBary       zBary        JD0
   -0.629779   52.200155    0.935018   -0.004079   -0.384637  2457273.133899
# Heliocentric elements and errors
Epoch:              2457270.5000  =  2015/09/05
Mean Anomaly:          353.88462 +/-     0.001
Argument of Peri:      210.17028 +/-     0.002
Long of Asc Node:      222.09802 +/-     0.000
Inclination:             5.73138 +/-     0.000
Eccentricity:         0.54338958 +/-    0.0000
Semi-Major Axis:     28.30778303 +/-    0.0018
Time of Perihelion: 2458204.9977 +/-       0.1
Perihelion:          12.92562873 +/-    0.0011
Aphelion:            43.68993733 +/-    0.0028
Period (y)              150.6146 +/-      0.01
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X            8.88796154 +/-    0.0000
Ecliptic Y            9.93749084 +/-    0.0001
Ecliptic Z           -0.14202959 +/-    0.0000
Ecliptic XDOT        -0.00484656 +/-    0.0000
Ecliptic YDOT         0.00318248 +/-    0.0000
Ecliptic ZDOT        -0.00056311 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   13.33303255 +/-    0.0001
Geocenter to KBO     12.91846348 +/-    0.0001
# Hcoef: 12.91

The following table shows the complete astrometric record for 15VF164. The first three columns show the date of observation. The next six columns are RA and DEC. The next column (when provided) is the observed magnitude and filter. The next column is the object name (15VF164) followed by the observatory code and reference code for the source of the astrometry.

2015 09  07.63311  03 19 49.751  +17 42 36.75  24.5w 15VF164   568  C~2jiD      
2015 09  12.49674  03 19 42.538  +17 41 09.74  24.5w 15VF164   568  C~2jiD      
2015 10  07.54436  03 17 22.450  +17 27 10.44  24.5w 15VF164   568  C~2jiD      
2015 10  07.60373  03 17 21.922  +17 27 07.68  24.5w 15VF164   568  C~2jiD      
2015 11  07.35903  03 11 36.975  +16 58 54.45  24.0r 15VF164   568  C~2jiD      
2015 11  07.40112  03 11 36.426  +16 58 51.84  23.9r 15VF164   568  C~2jiD      
2015 11  07.44330  03 11 35.871  +16 58 49.33  23.9r 15VF164   568  C~2jiD      
2015 11  10.52886  03 10 56.150  +16 55 39.65  24.2w 15VF164   568  C~2jiD      
2015 11  17.37547  03 09 27.849  +16 48 39.03  24.0w 15VF164   568  C~2jiD      
2015 11  17.42215  03 09 27.253  +16 48 36.24  24.1w 15VF164   568  C~2jiD      
2015 12  06.40182  03 05 37.143  +16 30 15.68  24.4w 15VF164   568  C~2jiD      
2015 12  13.33636  03 04 24.753  +16 24 24.60  24.3w 15VF164   568  C~2jiD      
2015 12  13.39494  03 04 24.165  +16 24 21.73  24.4w 15VF164   568  C~2jiD      
2016 01  01.39556  03 01 58.929  +16 12 11.67  24.5w 15VF164   568  C~2jiD      
2016 01  07.34177  03 01 32.613  +16 09 47.02  24.3w 15VF164   568  C~2jiD      
2016 02  04.27190  03 01 50.913  +16 08 43.93  24.5w 15VF164   568  C~2jiD      
2016 02  10.26162  03 02 26.038  +16 10 43.52  24.2w 15VF164   568  C~2jiD      
2016 10  28.42985  03 55 12.340  +18 32 35.91        15VF164   568  C~2jiD      
2016 10  28.45307  03 55 12.064  +18 32 34.80        15VF164   568  C~2jiD      
2016 10  29.50306  03 55 00.026  +18 31 44.68        15VF164   568  C~2jiD      
2016 11  02.55644  03 54 11.996  +18 28 27.08        15VF164   568  C~2jiD      
2016 12  24.37158  03 43 27.170  +17 47 18.64  24.4w 15VF164   568  C~2jiD      
2020 02  18.124990 05 44 22.317  +18 57 17.42  25.0G 15VF164   G37  C~3jl6      
2020 02  18.186050 05 44 22.127  +18 57 17.94        15VF164   G37  C~3jl6      

The following table shows the residuals to the orbit fit. The first coumn is the point number. The second column is the time, in years, measured from the first observation. The third and fifth columns are the regularized positions used in the orbit fit. The fourth and sixth columns are the residuals, in arc seconds, for RA and Dec respectively.

     1   0.0000      0.00    -0.08       0.00     0.02
     2   0.0133   -121.91     0.10     -57.72     0.00
     3   0.0819  -2273.89    -0.06    -352.72    -0.03
     4   0.0821  -2281.90    -0.01    -353.43    -0.09
     5   0.1663  -7498.68     0.04    -689.25     0.08
     6   0.1664  -7506.98     0.05    -689.67     0.03
     7   0.1665  -7515.33     0.04    -689.97     0.10
     8   0.1749  -8116.06    -0.01    -720.86    -0.16
     9   0.1937  -9452.38    -0.24    -786.59    -0.05
    10   0.1938  -9461.39     0.02    -786.97    -0.06
    11   0.2458 -12953.15     0.11    -950.07     0.06
    12   0.2648 -14055.60    -0.02   -1002.39     0.15
    13   0.2649 -14064.57     0.00   -1002.82     0.09
    14   0.3169 -16287.87     0.00   -1127.26     0.02
    15   0.3332 -16694.84     0.05   -1160.98    -0.02
    16   0.4097 -16457.63     0.08   -1295.30    -0.01
    17   0.4261 -15935.07    -0.08   -1320.84    -0.01
    18   1.1411  30342.41     0.04   -4156.95    -0.06
    19   1.1412  30338.25    -0.04   -4157.21    -0.06
    20   1.1441  30156.51     0.05   -4170.27    -0.03
    21   1.1552  29432.15     0.00   -4219.48     0.02
    22   1.2970  19784.50    -0.07   -4615.22     0.00
    23   4.4476 139484.53     0.05  -17030.11     0.11
    24   4.4478 139480.62    -0.05  -17029.22    -0.09

The following table comes from a 10My integration of the orbit of the object. Three columns are shown. The first column is the result of integrating the nominal orbit. The other two columns are based on clones of the nominal orbit that are +/- 3 sigma from the nominal orbit. If all three types agree then the classificiation is deemed secure. The basis for these calculations is described in more detail in AJ, 129, 1117 (2005). Any use made of these calculations should refer to and credit this publication and the Deep Ecliptic Survey Team.

15VF164    quality flag:3

Type:       CENTAURR  CENTAURR  CENTAURR

axisobj        28.547    28.551    28.542
ecceobj         0.545     0.545     0.545
incobj          5.703     5.703     5.703
qmin           12.527    12.672    12.677
qmax           44.117    44.126    44.109
amean          27.987    27.753    28.058
amin           27.574    27.002    27.567
amax           28.547    28.551    28.604
emean           0.542     0.533     0.536
emin            0.530     0.516     0.528
emax            0.552     0.546     0.545
imean           7.201     7.155     8.074
imin            6.528     6.528     6.528
imax            7.880     8.029     9.053
excite_mean     0.557     0.548     0.555
fracstop        0.004     0.004     0.007
cjmean          2.685     2.699     2.689

libcent 0      -180.0    -180.0    -180.0
libamp  0      -180.0    -180.0    -180.0
libcent 1      -180.0    -180.0    -180.0
libamp  1      -180.0    -180.0    -180.0
libcent 2      -180.0    -180.0    -180.0
libamp  2      -180.0    -180.0    -180.0
libcent 3      -180.0    -180.0    -180.0
libamp  3      -180.0    -180.0    -180.0
libcent 4      -180.0    -180.0    -180.0
libamp  4      -180.0    -180.0    -180.0

kozaimean       233.0     238.5     242.9
kozaiamp         20.5      30.5      31.4